my g/f is not on the pill and shes 16. we have had sex around 5 times total so far during our 2 year relationship. Her last period ended on Dec 23 and today is the 22 thats 29 days. .....well last weekend when we were fooling around and i was fingering her when i finished i noticed she had a brown color stuff coming out so i figured she just started her period or something. But it only happened that time so i don't know. We used a condom every time we had sex and i also didn't go off while i was inside her to be even more safe.